Question

A magnet of length 10 cm and magnetic moment $1Am^2$ is placed along the side of an. equilateral triangle of the side AB of length 10 cm. The magnetic induction at third vertex third vertex C is

• A. $10^{-9}\,T$
• B. $10^{-7}\,T$
• C. $10^{-5}\,T$
• D. $10^{-4}\,T$

Answer 1

Answer: (D)

$10^{-4}\,T$

Answer 2

$B = \frac{\mu_0}{4\pi} \frac{M}{\left( \frac{\sqrt{3} d}{2} \right)^3}$